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2005/vince/README.md

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+# Most beauteous visuals
+
+Vincent Weaver
+Ithaca, NY
+USA
+vince@deater.net
+<http://www.deater.net/weave/>
+
+## Judges' comments
+
+This beauteous entry makes use of visual {}'s and whitespace to instruct
+the OpenGL development libraries to create beauteous visuals.  Even
+hitting the space bar while the program runs produces a "spacey" effect! :-)
+
+Challenge: Try modifying the texture to something of your own design.
+
+## Improved Version
+
+This following improved version of the submission will run on SGI Irix and
+also has the recursive CPP macro (which snuck in accidentally) removed.
+
+### To build
+
+Before building, make sure that you have the OpenGL development libraries
+installed.
+
+        cc -Wall -O2 -o vince vince.c -L/usr/X11R6/lib -lGL -lGLU -lX11
+
+If you are on a 64 bit platform you might need to substitute `-L/usr/X11R6/lib64`.
+
+### To run
+
+        vince
+
+Under MacOSX run from within an xterm while the X11 server is running.
+
+## Author's comments
+
+### ABUSE OF RULES
+
+  * The executable needs to read in its own source code in order to run. As
+long as the source is in the same directory as the executable it should be
+able to find it...
+
+  * The program requires the OpenGL library.
+
+  * The program abuses severely the whitespace and { } ; exceptions in the
+filesize limits.
+
+### Requirements
+
+  * OpenGL. It works (slowly) with Mesa.
+
+  * 16bpp graphics capability (but might work at other depths)
+
+  * The original source needs to be in the same directory as the executable,
+and the source's name should be the same as the executable but with .c on the
+end.
+
+### Background
+
+I was annoyed after the last IOCCC because I slaved away on a clever text
+based game only to find all of the game winners used X11. X11 isn't standard
+C!
+
+So to one up them, I decided to use OpenGL. It's standard, and most Unix-like
+systems these days have either accelerated graphics or else software
+rendering.
+
+### Obfuscation
+
+It was a challenge getting the source code below the 2k limit. OpenGL has way
+too many GRATUITOUSLY_LONG_CONSTANTS and glLongStudlyFunctionNames();
+
+Therefore, much of the obfuscation comes secondary to just reducing the code
+size to fit under the limit while still having some semblance of a demo.
+
+There are some interesting abuses scattered about.
+
+### Usage
+
+Try hitting the spacebar when the program is running.
+
+### For Fun
+
+Try modifying the texture to your own custom design...
+
+### Thanks
+
+Many thanks to John Clemens for testing this on various machines for me.
+
+### Errors you can get
+
+        0 = no error
+        1 = X problem
+        2 = Can't open glx
+        3 = Can't open 16bpp visual
+        4 = can't open source file